Sorry, it truly seems straight forward to me once the addressbook is setup and you are at the printer itself when you would have been following the directions..
Addressbook >
Persons name >
If they have fax,email and networks (Sorry I wasn't more clear by typing the exact wording here, I had made an assumption) in their name, select the one they want
Anything beyond that has to be troubleshooting a Scan failure, and your post does not contain anything about the results of a scan attempt, only how one is made, so I felt no need to verify the formatting of anything.